Raphionacme madiensis S.Moore

Apocynaceae (part 2), David Goyder, Timothy Harris, Siro Masinde, Ulrich Meve, Johan Venter. Flora of Tropical East Africa, 2012

Morphology General Habit

Herb, up to 0.2 m tall, profusely lactiferous.

Vegetative Multiplication Tubers

Tuber sub-spherical, up to 16 cm diameter.

Morphology Stem

Aerial stems erect to spreading, branching lateral, 10–16 cm long, puberulent to scabridulous

Morphology Leaves

Leaf petiole 5–20 mm long, puberulent; blade ovate, narrowly ovate, elliptic, narrowly elliptic, obovate or narrowly obovate, (5–)8–15 × (1–)3–5 cm, acute, base tapering, crinkled, above green, puberulent, veins pale and densely puberulous, beneath pale green, puberulent, veins prominent and densely puberulous, margin wavy

Morphology Reproductive morphology Inflorescences

Inflorescences terminal and axillary, compact, manyflowered, densely puberulous to scabridulous.

Morphology Reproductive morphology Inflorescences Peduncles

Peduncles 0.5–1 cm long.

Morphology Reproductive morphology Inflorescences Bracts

Bracts subulate, 3–5 mm long.

Morphology Reproductive morphology Flowers Pedicel

Pedicels 5–7 mm long

Morphology Reproductive morphology Flowers Calyx

Sepals very narrowly triangular or narrrowly ovate, 2–3 mm long

Morphology Reproductive morphology Flowers Corolla

Corolla tube campanulate, ± 2 mm long, puberulous outside; lobes oblong-ovate, oblong-triangular, narrowly ovate or narrowly triangular, 5–7 × ± 2 mm, outside puberulent, green, inside glabrous, green or dull green to whitish with brown, pink, magenta or violet streaks, and/or tips and/or margins

Morphology Reproductive morphology Flowers Corona

Coronal feet columnar, ± 1 mm long, fused laterally to inner base of corolla lobes, apically tri-segmented; central segment filiform, 5–7 mm long, apex bifid or not, tortuous, papillose, lateral segments filiform, 2–3 mm long, glabrous or papillose

Morphology Reproductive morphology Flowers Androecium Stamens Filaments

Staminal filaments filiform, curving inwards, ± 1 mm long.

Morphology Reproductive morphology Flowers Androecium Stamens Anthers

Anthers white, ovate, ± 2 mm long, apices fused together over style-head.

Morphology Reproductive morphology Flowers Gynoecium Style

Style terete, ± 1 mm long; stylehead ovoid, acute

Morphology Reproductive morphology Flowers Gynostegium

Gynostegium base in corolla mouth

Morphology Reproductive morphology Fruits

Follicles solitary, erect, ovoid, 4.5–6 cm long, 1.2–1.5 cm diameter, with tapering apex

Morphology Reproductive morphology Seeds

Seeds unknown.

Ecology

Wooded grassland and grassland on rocky outcrops and in shallow rock-basins; 850–2050 m

Distribution

Range: Congo-Kinshasa, Rwanda, Burundi, Angola, Zambia Flora districts: U1 U3 K3 T1 T4 T7